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| Speciation of Arsenic in the Sediments of Tai Lake by Microwave-Assisted Extraction High Performance Liquid Chromatography and Hydride Generation-Atomic Fluorescence Spectrometry |
| Received:September 22, 2011 Revised:December 30, 2011 |
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| DOI：10.3969/j.issn.2095-1035.2012.01.0004 |
| KeyWord:arsenic speciation; sediment; LC; AFS |
| Author | Institution |
| WU Shuo |
江南大学 化学与材料工程学院; 江南大学 国家食品科学与技术重点实验室，江苏 无锡 |
| YU Ruipeng |
江南大学 国家食品科学与技术重点实验室，江苏 无锡 |
| SONG Qijun |
江南大学 化学与材料工程学院，江苏 无锡 |
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| Abstract: |
| Based on microwave-assisted extraction-liquid chromatography and hydride generation-atomic fluorescence spectrometry, an analytical method for speciation of arsenic containing compound (arsenite As(III), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA) and arsenate As(V)) in the Tai lake sediment was developed. The results showed that the main speciation in sediments is inorganic arsenic and arsenate As(V) is the majority of the speciation. This paper chose 1 mol/L phosphoric acid as extracting solution and the microwave-assisted extraction was conducted for 12 mins with a power of 60 W. The extraction rates were in the range of 79.84%~91.57%. The linear responses for four arsenic species were in the range of 0~160 μg/L with the limits of detection in the range of 0.6~2.3 μg/L, and the recovery rates in the range of 94.78%~107.6%. The developed method is simple, rapid and sensitive, and may be applicable for arsenic speciation in other sediments or soil samples. |
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